did a head job and after reassembled will not start. narrowed down to inj silenoid, got power to it and fuel but will not let fuel pass through to the inj. removed the inj lines still no fuel coming out. spider system with popit inj. 4.3 vortec. checked grounds and fuses im about to junk it if cant fix. have put so much time and money into it dont want to do that. please give me a clue

 

Injector seloniod? Quit making up parts . You probably mean fuel pump relay, Sure the timing is dead on? Fuel pump priming? I assume it ran before head job.

 

the part inj plug into whatever its called? pump is priming, timing is dead on, i drove it the day i tore it down had blown gasket and rebuilt heads with shaving. fuel gos in relay and dosent make it to inj. lines?

 

Did you forget to hook anything up?> Like your crank or cam sensor(plug that goes into distributor)? Did you hook up the two wire plug that goes through the lower plenum and plugs into the injector?

Sure you timed it on the compression stroke and not the exhaust stroke?

 

check all 100 times thats why so lost it just dosent make sense even changed relay twice no diff. put a meter on connector got 12 volts in one side and mvolts on other side i assume thats the brain signaling, thats were the wire is coming from.

 

Pull a plug and hold it near metal while a friend cranks to see if you got any fire. Any fuel squirt out of the schrader valve on the back of the lower plenum when you depress it? Your gonna want to check the fuel pressure next. Does it sound slow or bogged?

 

going to check pressure today and yes has spark

 

has 60psi on fuel and cant find a ground loose? have three diff relays fuel makes it into the relay, regulator, and will not go to the inj lines to even make it to the inj themselves. checked plug on relay has 12 volts on one side and 30-200 mvolts on other side i assume its comp. signal cause thats were that wire comes from. what will make relay not work besides bad relay. i have three not all are bad!

 

Your engine only has one electronic injector which is located in the center of the metering body (center of the spider). It feeds fuel out to the 6 individual pressure actuated poppet nozzles that are at the ends of the 'spider's legs.

I would look at the connection to the electronic injector. This is a fairly common weak point in the CPI system. No where near as common as a FPR/nut-kit leak or gummed up poppet nozzles, but still common.

 

it was the ignition module. thanks for the help and advice appreciate it.